e fuller is the founder of the treatment advocacy center and author of the "insanity offense" how america's failure it treat the seriously mentally ill is endangering its citizens. doctor torrey. welcome here. and you've written you're not against guns, but people's access. how many people are we talking about across the united states. >> it's a gun problem and a mental illness problem and 7 million at any given time, of these, half are not being treated at any given time and about 1% or 70,000 are potentially dangerous at any given time and we're not treating those people. >> paul: how do we get around to treating them? we don't know, for example, that adam lanza really was mentally ill. we haven't seen if -- we don't know if there was a formal diagnosis so how do we identify those people and make sure they get treatment? >> most of the potentially dangerous people we can identify. you can walk into the police station in any small town in the united states, say, who are the potentially dangerous people that you know about? and say, well, john over on fourth street, we have to go and visit